feat(migrate): BookStack importer

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

migrate/sources/bookstack.js

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+import * as pages from '../../lib/db/repos/pages.js';
+import * as map from '../../lib/db/repos/migration_map.js';
+
+const SYS = { kind: 'system', id: null };
+const slugify = (s) => (s || '').toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/(^-|-$)/g, '').slice(0, 60) || 'page';
+
+// BookStack REST: list GET /api/pages → {data:[{id,name}]}; detail GET /api/pages/:id
+// → {id,name,markdown,html}. Auth header: "Token <id>:<secret>".
+export async function importBookstack({ apiUrl = process.env.BOOKSTACK_URL, tokenId = process.env.BOOKSTACK_TOKEN_ID, tokenSecret = process.env.BOOKSTACK_TOKEN_SECRET, spaceId, dryRun = false, fetchImpl = fetch }) {
+  const headers = { Authorization: `Token ${tokenId}:${tokenSecret}` };
+  const listRes = await fetchImpl(`${apiUrl}/api/pages`, { headers });
+  if (!listRes.ok) throw new Error(`bookstack list ${listRes.status}`);
+  const { data = [] } = await listRes.json();
+  let created = 0;
+  for (const item of data) {
+    if (await map.seen('bookstack', `page:${item.id}`, 'page')) continue;
+    created++; if (dryRun) continue;
+    const dRes = await fetchImpl(`${apiUrl}/api/pages/${item.id}`, { headers });
+    if (!dRes.ok) throw new Error(`bookstack page ${item.id} ${dRes.status}`);
+    const d = await dRes.json();
+    const body = d.markdown && d.markdown.trim() ? d.markdown : (d.html || '');
+    const p = await pages.create({ space_id: spaceId, slug: slugify(d.name), title: d.name || 'Untitled', body_md: body }, SYS);
+    await map.record('bookstack', `page:${item.id}`, 'page', p.id);
+  }
+  return { created };
+}

tests/migrate/bookstack.test.js

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+import { describe, it, expect, beforeAll, vi } from 'vitest';
+import { pool } from '../../lib/db/pool.js';
+import { resetDb } from '../helpers/db.js';
+import { migrateUp } from '../../lib/db/migrate.js';
+import { ensureSpace } from '../../migrate/spaces.js';
+import { importBookstack } from '../../migrate/sources/bookstack.js';
+
+let spaceId;
+beforeAll(async () => { await resetDb(); await migrateUp(); spaceId = await ensureSpace('wiki', 'Wiki'); });
+
+describe('bookstack importer', () => {
+  it('imports pages with markdown body, idempotently', async () => {
+    const list = { data: [{ id: 1, name: 'Page One' }, { id: 2, name: 'Page Two' }] };
+    const detail = (id) => ({ id, name: id === 1 ? 'Page One' : 'Page Two', markdown: `# P${id}\nbody`, html: `<p>body</p>` });
+    const fetchImpl = vi.fn(async (u) => {
+      if (u.endsWith('/api/pages')) return { ok: true, json: async () => list };
+      const id = Number(u.split('/').pop());
+      return { ok: true, json: async () => detail(id) };
+    });
+    const r1 = await importBookstack({ apiUrl: 'http://bs', tokenId: 'i', tokenSecret: 's', spaceId, fetchImpl });
+    expect(r1.created).toBe(2);
+    const { rows } = await pool.query(`SELECT title FROM pages WHERE space_id=$1 ORDER BY title`, [spaceId]);
+    expect(rows.map(r => r.title)).toEqual(['Page One', 'Page Two']);
+    const r2 = await importBookstack({ apiUrl: 'http://bs', tokenId: 'i', tokenSecret: 's', spaceId, fetchImpl });
+    expect(r2.created).toBe(0);
+  });
+});